Journal of cardiothoracic and vascular anesthesia
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J. Cardiothorac. Vasc. Anesth. · Feb 1998
Relationships between cerebral blood flow velocities and arterial pressures during intra-aortic counterpulsation.
To determine the effects of intra-aortic counterpulsation (IABP) on cerebral blood flow velocity. ⋯ IABP modified the phasic profile of cerebral blood flow to reflect the arterial pressure waveform without affecting mean cerebral blood flow velocity. Peak systolic cerebral blood flow velocity was maintained in augmented beats despite the decreased systolic arterial pressure associated with afterload reduction. The acute decrease in cerebral blood flow velocity at pre-ejection was balanced by increased cerebral blood flow velocity during balloon inflation in diastole.
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J. Cardiothorac. Vasc. Anesth. · Feb 1998
Vectorcardiographic changes as predictors of cardiac complications during major vascular surgery.
To elucidate the relation of changes in computerized vectorcardiographic trend parameters indicating perioperative myocardial ischemia with perioperative cardiac complications. ⋯ Vectorcardiographic signs of myocardial ischemia were significantly increased intraoperatively, but most pronounced postoperatively in the patients subsequently suffering cardiac events. The changes could be related to the individual cardiac morbidity with acceptable precision. Thus, continuous vectorcardiographic monitoring may be beneficial for patients at risk of developing perioperative ischemia.
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J. Cardiothorac. Vasc. Anesth. · Dec 1997
Randomized Controlled Trial Clinical TrialA pump-prime aprotinin dose in cardiac surgery: appraisal of its effects on the hemostatic system.
To examine pump-prime aprotinin action on coagulation and fibrinolysis in patients undergoing primary coronary revascularization. ⋯ Pump-prime aprotinin minimized, even if not completely inhibited, the activation of coagulation and fibrinolysis during CPB, possibly ensuring a less complicated and safer postoperative recovery. It seemed to allow the maintenance of a correct balance of hemostatic systems, avoiding the risk of thrombotic phenomena.
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J. Cardiothorac. Vasc. Anesth. · Dec 1997
Comparative StudyPlatelet concentrate effects on thromboelastography.
This study evaluated platelet effects on thromboelastography to determine how morphologically abnormal platelets affected native whole blood analysis. ⋯ Viscoelastic changes in whole blood coagulation after the addition of platelet concentrates are not dependent on morphologically intact or functionally normal platelets. This in vitro study predicts that transfusion of poorly preserved platelet concentrates as well as fresh platelets would increase clot strength on thromboelastography if the recipient's blood were tested immediately after administration.
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J. Cardiothorac. Vasc. Anesth. · Dec 1997
Coagulation tests predict bleeding after cardiopulmonary bypass.
To determine the accuracy of coagulation profile laboratory tests, thromboelastography, and Sonoclot (SCT) values for predicting microvascular bleeding after cardiopulmonary bypass (CPB). ⋯ Contrary to previous studies, coagulation profile tests had the greatest sensitivity and specificity to differentiate patients with excessive bleeding (abnormal) from those without excessive bleeding (normal) after CPB. Therefore, these tests should be used to guide transfusion therapy in patients who have excessive bleeding after CPB.